Kami,
I use questions all the time and more open-ended ones - this allows more critical thinking. I try to get participation from everyone and sometimes I call on the quiet students by name, in which case, I ask simple questions or ones seeking opinions. If someone seems stuck or hesitant, I open the question to the class in a way that would not embarass the first student. I may say, "Who wants to share their opinion?" I always let students know that I do not have all the answers and I will try to get the answers for them. Sometimes, I ask them to investigate and come back to the class with the answers.
Judy Mohammed